This commit includes BMP280 driver registration on I2C1 in the RPi4B
bringup logic _if_ the user selects the board-level configuration option
(so as to not interfere with any user's custom implementation of
interfacing with this sensor). A configuration is added with the BMP280
registration, example program and `uorb_listener` that is also
documented.
Signed-off-by: Matteo Golin <matteo.golin@gmail.com>